KR20080008150A - A leaf spring mounting structure of suspension system for vehicle - Google Patents

A leaf spring mounting structure of suspension system for vehicle Download PDF

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Publication number
KR20080008150A
KR20080008150A KR1020060067651A KR20060067651A KR20080008150A KR 20080008150 A KR20080008150 A KR 20080008150A KR 1020060067651 A KR1020060067651 A KR 1020060067651A KR 20060067651 A KR20060067651 A KR 20060067651A KR 20080008150 A KR20080008150 A KR 20080008150A
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KR
South Korea
Prior art keywords
leaf spring
vehicle
mounting structure
spring mounting
suspension system
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KR1020060067651A
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Korean (ko)
Inventor
김기원
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기아자동차주식회사
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Priority to KR1020060067651A priority Critical patent/KR20080008150A/en
Publication of KR20080008150A publication Critical patent/KR20080008150A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B60G11/12—Links, pins, or bushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/121—Mounting of leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/43—Fittings, brackets or knuckles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/73—Rubber; Elastomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8207—Joining by screwing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/182—Leaf springs with inter-engaging portions between leaves or between leaves and mountings, e.g. ridges, notches, ripples

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A leaf spring mounting structure of suspension system of a vehicle is provided to prevent a steering system from being influenced by moving up a vehicle axle vertically while distributing a spring reacting force. A leaf spring mounting structure of suspension system of a vehicle, in connecting a leaf spring(2) of a vehicle suspension system to a vehicle frame, comprises: eye portions(28) in front and rear sides of the leaf spring fixedly bolted to a long hole formed horizontally on a front bracket and a rear bracket(8) so as to be slid back and forth and a bump stopper(20) respectively arranged in a front side portion of the front bracket and in a rear side portion of the rear bracket.

Description

자동차 현가장치의 리프 스프링 장착구조{A LEAF SPRING MOUNTING STRUCTURE OF SUSPENSION SYSTEM FOR VEHICLE}Leaf spring mounting structure for vehicle suspension system {A LEAF SPRING MOUNTING STRUCTURE OF SUSPENSION SYSTEM FOR VEHICLE}

도 1은 본 발명에 의하여 리프 스프링을 장착한 상태의 측면도.1 is a side view of a leaf spring mounted state according to the present invention.

도 2는 도 1의 A - A선 단면도.2 is a cross-sectional view taken along the line AA of FIG.

도 3은 범프시의 작동 상태 단면도.3 is a cross-sectional view of an operating state during bumps.

도 4는 본 발명에 의한 작동을 설명하기 위한 개략도.4 is a schematic view for explaining the operation according to the present invention.

도 5는 종래 리프 스프링의 장착 상태도이다.5 is a mounting state diagram of a conventional leaf spring.

본 발명은 자동차 현가장치의 리프 스프링 장착구조에 관한 것으로서, 보다 상세하게는 범프시 양 방향으로 스프링 반력이 분배되면서 차축이 수직 상승되도록 하여 스티어링계에 영향을 미치지 않도록 한 자동차 현가장치의 리프 스프링 장착구조에 관한 것이다.The present invention relates to a leaf spring mounting structure of a vehicle suspension device, and more particularly, the leaf spring mounting of the vehicle suspension device so that the axle is vertically raised while the spring reaction force is distributed in both directions during bumps so as not to affect the steering system. It's about structure.

예컨대, 자동차에 있어서의 현가장치는 차체와 차륜 사이에 존재하면서 이 2개의 강체를 하나 혹은 다수의 컨트롤 아암으로 연결하여 주는 장치로서, 상하 방향으로는 스프링과 쇽 업소오버에 의하여 지지되고, 기타 방향으로는 높은 강성과 유연성을 적절히 조화시킴으로써, 차체와 차륜 사이의 상대운동을 기계적으로 적절히 조화시키는 장치이다.For example, a suspension device in an automobile is a device that exists between a vehicle body and a wheel and connects two rigid bodies with one or more control arms. The suspension device is supported by a spring and a shock absorber in the vertical direction, and in other directions. It is a device that mechanically harmonizes the relative movement between the vehicle body and the wheel by appropriately matching high rigidity and flexibility.

이러한 현가장치는 차량의 주행중에 발생되는 노면의 불규칙한 입력을 효과적으로 차단하여 탑승자에게 안락한 승차감을 제공하고, 운전자의 운전 행위 및 노면 굴곡에 의하여 발생된 차체의 흔들림은 적절히 제어하여 운전 편의성을 제공하며, 불규칙한 노면의 주행시 접지면에서의 수직하중을 적절한 수준으로 유지하여 선회, 제동 구동시 차량의 조정성 및 안정성을 확보하여야만 한다.The suspension system effectively blocks irregular input of the road surface generated while driving the vehicle, providing a comfortable ride to the occupant, and provides driving convenience by appropriately controlling the shaking of the vehicle body caused by the driver's driving behavior and road curvature. When driving on irregular roads, the vertical load on the ground should be maintained at an appropriate level to ensure the controllability and stability of the vehicle during turning and braking.

상기와 같은 현가장치는 여러 종류가 있으나, 본 발명은 일체식 현가장치의 일종인 리프 스프링 타입의 현가장치에 관계한다.There are many kinds of suspensions as described above, but the present invention relates to a leaf spring type suspension that is a kind of integrated suspension.

상기 리프 스프링은 띠 모양의 스프링 강판이 여러 겹으로 중첩되어 형성되며, 그 장착 구조를 살펴보면, 도 5에서와 같이 리프 스프링(100)의 전단부 아이는 차체(102)에 부착된 브라켓(104)에 직접 연결되고, 후단부 아이는 새클(Shackle, 106))을 개재시켜 후측 브라켓(108)에 연결되는 구성을 갖는다.The leaf spring is formed by overlapping a strip-shaped spring steel sheet in multiple layers. Looking at the mounting structure, as shown in FIG. 5, the front end of the leaf spring 100 has a bracket 104 attached to the vehicle body 102. Directly connected to the rear end eye has a configuration that is connected to the rear bracket 108 via a Shackle (106).

이에 따라 부하가 작은 경우에는 리프 스프링(100)의 탄성변형이 발생하기 이전에 새클(106)의 회전 운동이 발생하고, 이러한 새클(106)의 회전 운동 범위를 넘어서는 부하에 대해서만 리프 스프링(100)의 탄성력을 발휘하게 된다.Accordingly, when the load is small, the rotational motion of the sackle 106 occurs before the elastic deformation of the leaf spring 100 occurs, and the leaf spring 100 only applies to the load that exceeds the range of the rotational motion of the sackle 106. The elastic force of the will be exhibited.

그러나 상기와 같이 리프 스프링을 장착하는 경우에는 범프시 리프 스프링이 펴지면서 새클이 회전하는 구조로 되어 있는 바, 리프 스프링에 고정되어 있는 차축이 범프시 후측으로 이동하면서 상승하게 됨으로써, 전륜의 경우 너클에 체결되 어 있는 피트먼 아암이 드래그 링크를 당겨 주게 된다.However, when the leaf spring is mounted as described above, the leaf spring expands when bumping, and the sackle rotates. The axle fixed to the leaf spring moves upward while bumping, and ascends, the front wheel is knuckle. The Pitman arm, which is fastened to it, pulls the drag link.

이에 따라 왼쪽 휠은 토우 아웃, 오른쪽 휠은 토우 임 형태로 범프 토우가 변하게 되고, 적재시 드래그 링크의 궤적과 휠의 궤적이 상이함으로써 조안성(쏠림)에 악영향을 미치게 되는 문제점을 내포하고 있다.Accordingly, bump tow is changed in the form of toe out and the right wheel is toe out, and the trajectory of the drag link is different from the trajectory of the wheel during loading.

따라서 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명된 것으로서, 본 발명의 목적은 범프시 양 방향으로 스프링 반력이 분배되면서 차축이 수직 상승되도록 하여 스티어링계에 영향을 미치지 않도록 한 자동차 현가장치의 리프 스프링 장착구조를 제공하려는 것이다.Therefore, the present invention has been invented to solve the above problems, an object of the present invention is to lift the axle vertically while the spring reaction force is distributed in both directions when bump so that the leaf of the vehicle suspension system does not affect the steering system To provide a spring-loaded structure.

이를 실현하기 위하여 본 발명은, 자동차 현가장치의 리프 스프링을 차체에 연결함에 있어서, In order to realize this, the present invention, in connecting the leaf spring of the vehicle suspension to the vehicle body,

전,후측 브라켓에 수평 방향으로 장공을 형성하여 이의 장공에 리프 스프링의 전,후측 아이 부분을 고정 볼트로서 전후 슬라이드 가능하게 체결 고정하고, 상기 전측 브라켓의 장공 전측부와 상기 후측 브라켓의 장공 후측부에 각각 범프 스톱퍼를 배치하여 이루어지는 자동차 현가장치의 리프 스프링 장착구조를 제공한다. A long hole is formed in the front and rear brackets in a horizontal direction, and the front and rear eye portions of the leaf springs are fixed to the long holes so as to slide back and forth with fixing bolts, and the front side of the long hole of the front bracket and the rear side of the long hole of the rear bracket. Provided is a leaf spring mounting structure of a vehicle suspension device, each of which is provided with a bump stopper.

이하, 상기의 목적을 구체적으로 실현할 수 있는 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

도 1은 본 발명에 의하여 리프 스프링을 장착한 상태를 보인 도면으로서, 부호 2는 리프 스프링을 총칭한다.1 is a view showing a state in which a leaf spring is mounted in accordance with the present invention, 2 denotes a leaf spring.

상기 리프 스프링(2)은 종래와 마찬가지로 띠상의 스프링 강판을 여러 겹으 로 중첩시켜 형성한 것으로서, 이 리프 스프링(2)의 전,후측 아이가 차체(4)고 고착되어 있는 전,후 브라켓(6)(8)에 직접 연결된다.The leaf spring (2) is formed by overlapping a band-like spring steel sheet in several layers as in the prior art, and the front and rear brackets to which the front and rear eyes of the leaf spring (2) are fixed to the vehicle body (4). (8) is directly connected.

상기 전,후측 브라켓(6)(8)에는 수평 방향으로 일정 길이를 갖는 장공(10)(12)을 형성하고, 이의 장공(10)(12)에 리프 스프링(2)의 전,후측 아이 부분을 고정 볼트(14)(16)로서 전후 슬라이드 가능하게 체결 연결한 것이다.The front and rear brackets 6 and 8 form long holes 10 and 12 having a predetermined length in the horizontal direction, and the front and rear eye portions of the leaf spring 2 in the long holes 10 and 12 thereof. Is fastened to the front and rear slides as fixing bolts (14) and (16).

그리고 전측 브라켓(6)은 장공(10)의 전측부에, 후측 브라켓(8)은 장공(12)의 후측부에 범프 스톱퍼(18)(20)를 형성하였다.The front bracket 6 is formed at the front side of the long hole 10, and the rear bracket 8 is formed at the rear side of the long hole 12 at the bump stoppers 18 and 20.

상기 범프 스톱퍼(18)(20)는 동일 구조를 갖는데, 후측의 범프 스톱퍼(20)를 일예로 설명하면, 도 2에서와 같이 중앙부에 일정 길이를 갖는 고무부재(22)가 배치되고, 그 주위에는 코일 스프링(24)이 배치되며, 상기 코일 스프링(24)의 전측부에는 슬라이더(26)가 전후 슬라이드 가능하게 배치된다.The bump stoppers 18 and 20 have the same structure. Referring to the bump stopper 20 on the rear side as an example, as shown in FIG. The coil spring 24 is disposed, and the slider 26 is disposed on the front side of the coil spring 24 to be slidable back and forth.

상기에서 슬라이더(26)는 리프 스프링(2)의 후측 아이(28)와 직접적으로 접촉이 이루어지게 되는 바, 내구성 좋은 유연성 부재로 형성하는 것이 바람직하다.The slider 26 is in direct contact with the rear eye 28 of the leaf spring 2, it is preferable to form a durable flexible member.

만일 슬라이더(26)를 금속으로 형성하면 리프 스프링(2)의 후측 아이(28)와 접촉이 이루어질 때 금속성 소음이 발생하기 때문이다.This is because if the slider 26 is made of metal, metallic noise occurs when contacting the rear eye 28 of the leaf spring 2 is made.

그리고 상기 코일 스프링(24)은 범프 스톱퍼의 초기 변형시 보다 높은 스프링 특성을 발휘하여야 하며, 범프 스톱퍼의 복원성을 돕는 역할을 수행하게 된다.In addition, the coil spring 24 should exhibit a higher spring characteristic at the time of initial deformation of the bump stopper, and serves to help resilience of the bump stopper.

이를 위하여 상기 코일 스프링(24)의 스프링 특성은 범프 리바운드와 제동시 범프와의 차이점을 고려하여 튜닝하여야 하며, 특히 제동시에는 브레이크 캘리퍼와 디스크의 영향으로 발생하는 윈드 업 현상과 제동력에 의한 종방향의 하중 및 리프 스프링(2) 범프에 의한 분력을 고려하여 설정되어야 한다.To this end, the spring characteristics of the coil spring 24 should be tuned in consideration of the difference between the bump rebound and the bump during braking. In particular, during braking, the wind direction and the longitudinal force caused by the brake caliper and the disk are applied. It should be set in consideration of the load of the spring and the component force due to the bump of the leaf spring (2).

상기와 같이 리프 스프링(2)를 장착한 상태에서 노면 조건 및 기타 제반 조건에 의하여 리프 스프링(2)에 범프가 발생되면 리프 스프링(2)의 전,후 아이 부분이 수평방향으로의 구속력이 없는 바, 양 방향으로 리프 스프링(2)이 펴지게 된다.If bumps are generated on the leaf spring 2 by road conditions and other conditions in the state where the leaf spring 2 is mounted as described above, the eye parts before and after the leaf spring 2 have no restraining force in the horizontal direction. The leaf spring 2 is straightened in both directions.

이와같이 리프 스프링(2)의 펴지는 경우에는 전,후측 아이 부분이 각각 전,후측으로 이동하여 범프 스톱퍼(18)(20)와 접촉하게 되는데, 후측의 경우에는 도 3에서와 같이 아이(28)가 슬라이더(26)와 접촉되면서 후측으로 이동하게 된다.In this way, when the leaf spring 2 is unfolded, the front and rear eye portions are moved to the front and rear, respectively, to come into contact with the bump stoppers 18 and 20, and in the case of the rear side, as shown in FIG. Touches the slider 26 and moves to the rear side.

이와 같이 슬라이더(26)가 후측으로 이동하는 경우에는 코일 스프링(24)과 고무 부재(22)의 스트링 특성에 의하여 완충되면서 후측으로 이동하게 되는 것이다.In this way, when the slider 26 is moved to the rear side, the slider 26 is moved to the rear side while being buffered by the string characteristics of the coil spring 24 and the rubber member 22.

물론 전측 아이 부분도 미도시하였지만, 상기와 동일한 작동으로 완충력을 받으면서 전측으로 이동하게 된다.Of course, the front eye portion is not shown, but is moved to the front side while receiving a buffer force in the same operation as described above.

상기에서와 같이 제반 조건에 의하여 차축(30)이 범프를 하게 되면, 스프링 반력이 전,후방향으로 분배됨으로써, 도 4에서의 일점쇄선과 같이 펼쳐지게 되는 바, 차축(30)이 수직으로 움직이게 되는 것이다.As described above, when the axle 30 is bumped under various conditions, the spring reaction force is distributed in the front and rear directions, and thus the bar axle 30 moves vertically as shown in FIG. 4. will be.

이상에서와 같이 본 발명에 의하면, 리프 스프링의 범프시 새클에 의한 원형 범프 궤적의 영향이 없어지게 되는 바, 조향륜의 경우 수직 범프를 통하여 피트먼 아암과 드래그 링크의 운동 궤적과 휠 궤적이 동일하게 되어 토우 변화가 좌우 대칭이 되면서 직진 안정성을 확보할 수 있는 발명인 것이다.As described above, according to the present invention, when the leaf spring bumps, the influence of the circular bump trajectory caused by the sackle is eliminated. In the case of the steering wheel, the movement trajectory of the Pitman arm and the drag link and the wheel trajectory are the same through the vertical bumps. The tow change is left and right symmetry while the invention is to ensure a straight stability.

Claims (3)

자동차 현가장치의 리프 스프링을 차체에 연결함에 있어서, In connecting the leaf spring of the vehicle suspension to the body, 전,후측 브라켓에 수평 방향으로 장공을 형성하여 이의 장공에 리프 스프링의 전,후측 아이 부분을 고정 볼트로서 전후 슬라이드 가능하게 체결 고정하고, 상기 전측 브라켓의 장공 전측부와 상기 후측 브라켓의 장공 후측부에 각각 범프 스톱퍼를 배치하여 이루어짐을 특징으로 하는 자동차 현가장치의 리프 스프링 장착구조.A long hole is formed in the front and rear brackets in a horizontal direction, and the front and rear eye portions of the leaf springs are fixed to the long holes so as to slide back and forth with fixing bolts, and the front side of the long hole of the front bracket and the rear side of the long hole of the rear bracket. Leaf spring mounting structure of the vehicle suspension, characterized in that the bump stopper is disposed on each. 제1항에 있어서, 범프 스톱퍼는 리프 스프링의 전,후측 아이와 접촉되는 슬라이더를 전후 이동 가능하게 형성하고, 상기 슬라이더의 내측에는 일정 길이를 가는 고무부재와, 이의 고무부재 외측에 코일 스프링을 배치하여 이루어짐을 특징으로 하는 자동차 현가장치의 리프 스프링 장착구조.The method of claim 1, wherein the bump stopper is formed to the front and rear of the leaf contact slider to be movable back and forth, the inner side of the slider having a rubber member of a predetermined length and the coil spring outside the rubber member Leaf spring mounting structure of the vehicle suspension characterized in that made. 제2항에 있어서, 슬라이더는 내구성이 좋은 유연성 부재로 형성함을 특징으로 하는 자동차 현가장치의 리프 스프링 장착구조.The leaf spring mounting structure of claim 2, wherein the slider is formed of a flexible member having high durability.
KR1020060067651A 2006-07-19 2006-07-19 A leaf spring mounting structure of suspension system for vehicle KR20080008150A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103748380A (en) * 2011-08-29 2014-04-23 Zf腓特烈斯哈芬股份公司 Holder for spring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103748380A (en) * 2011-08-29 2014-04-23 Zf腓特烈斯哈芬股份公司 Holder for spring

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